21150158 has 8 divisors (see below), whose sum is σ = 32198952. Its totient is φ = 10417176.

The previous prime is 21150139. The next prime is 21150163. The reversal of 21150158 is 85105112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78785 + ... + 79052.

It is an arithmetic number, because the mean of its divisors is an integer number (4024869).

Almost surely, 2^21150158 is an apocalyptic number.

21150158 is a deficient number, since it is larger than the sum of its proper divisors (11048794).

21150158 is a wasteful number, since it uses less digits than its factorization.

21150158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157906.

The product of its (nonzero) digits is 400, while the sum is 23.

The square root of 21150158 is about 4598.9300929673. The cubic root of 21150158 is about 276.5484351514.

The spelling of 21150158 in words is "twenty-one million, one hundred fifty thousand, one hundred fifty-eight".